Abstract
For the difficulties of sand inrush of thick coal seam under water-bearing unconsolidated strata in mining projects, we carried out scientific analysis of hydro-geological conditions, including the lithology, thickness, and water yield property of water-bearing unconsolidated strata, On the basis, the heights of caving zone and water conducted zone were predicted, mining method was decided, the reasonable size of safety pillars was discussed under the condition of thick coal seam slicing mining. Based on the powerful data processing capabilities of GIS, the risk of sand inrush caused by multiple factors are analyzed quantitatively, and sand inrush risk zoning map was also analyzed eventually.
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